JPH0519725U - Automatic transmission for vehicle - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent the shift operation from becoming complicated while adding a shift lock function that restricts the shift operation from the neutral position. [Structure] The solenoid 3 restricts the movement of the shift lever 2 in an off state. The control circuit 9 turns on the solenoid 3 when the brake switch 7 is on immediately after the ignition switch 6 is turned on or when the solenoid 3 is off. When the neutral detection switch 4 is turned on while the solenoid 3 is on, the control circuit 9 keeps the brake switch 7 off and the neutral detection switch 4 on while the timer circuit 10 counts 10 minutes. If so, the solenoid 3 is turned off.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 In the present invention, the reverse position, the neutral position and the drive position are set as shift positions so as to be suitable for large vehicles such as trucks and buses, and the engine is allowed to start only when the shift lever is in the neutral position. The present invention relates to an automatic transmission for a vehicle.

[0002]

[Prior Art]

 In recent years, large vehicles such as trucks and buses equipped with an automatic transmission are being supplied. Such an automatic transmission for a large vehicle does not have a parking position like a passenger car, and its shift position is set to a reverse position, a neutral position and a drive position. In this case, engine starting is only permitted with the shift lever in the neutral position.

[0003]

[Problems to be solved by the device]

 By the way, in the case of the above-mentioned conventional example, the engine speed becomes high immediately after the engine is started due to the warm-up operation, so if the shift operation is performed from the neutral position to another position, the accelerator pedal may not be depressed Instead, the vehicle may start moving immediately. Therefore, it is conceivable to install a shift lock mechanism that allows the operation of the shift lever from the neutral position only when the brake pedal is depressed.However, with this, the shift lever once returned to the neutral position is moved to another shift position. There is a drawback in that the operability is extremely poor because the brake pedal must be depressed one by one when the vehicle is operated or when an operation is performed to pass the neutral position.

The present invention has been made in view of the above circumstances, and an object thereof is to set a reverse position, a neutral position, and a drive position as a shift position, and only when the shift lever is in the neutral position. It is an object of the present invention to provide an automatic transmission for a vehicle in which operability can be improved while adding a shift lock function for restricting a shift operation from a neutral position in the case of permitting the start of the engine.

[0005]

[Means for Solving the Problems]

 The present invention relates to an automatic transmission for a vehicle in which a reverse position, a neutral position and a drive position are set as a shift position, and the engine is allowed to start only when the shift lever is located in the neutral position. Immediately after starting the engine or immediately after the engine is started When the shift operation control means is switched to the regulated state, a release means is provided for switching the shift operation control means to the released state only when the brake pedal is operated. From the new position When a non-operation state of the brake pedal continues set time when it is located in Lal position is provided with a restricting means for switching the shift operation control means restricted state.

[0006]

[Action]

 Start the engine with the shift lever in the neutral position. At this time, when the brake pedal is not operated, the shift operation control means is switched to the restricted state, and therefore it is prohibited to operate the shift lever from the neutral position to another position. Further, if the brake pedal is operated immediately after the engine is started, the shift operation control means is switched to the released state by the restricting means, so that the shift operation of the shift lever can be performed.

Further, when the shift lever is shifted from another position to the neutral position while the shift lever is permitted to shift as described above, the regulating means counts the non-operated state of the brake pedal. When the brake pedal is in the non-operated state for more than the set time, the restricting means switches the shift operation controlling means to the restricting state, so that the shift operation of the shift lever from the neutral position is restricted. ..

[0008]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. 1, the shift lever 2 of the shift lever device 1 has a reverse position (R position), a neutral position (N position), a drive position (D position) and a low position (L position). It is provided so that it can be operated in each shift position. The shift lever device 1 is provided with a solenoid 3 as a shift operation control means, which is turned on / off according to an external signal. In this case, the solenoid 3 is configured to be in a restricted state in which the movement of the shift lever 2 is restricted in the off state, and in a released state in which the restriction on the movement of the shift lever 3 is released in the on state. Further, the automatic transmission body (not shown) is provided with a neutral detection switch 4 which is turned on and outputs an on signal when the shift lever 2 is shifted to the neutral position. In addition, the shift lever device 1 is provided with a mechanical release button 5 for forcibly switching the solenoid 3 to the ON state in the operated state.

Further, the ignition switch 6 outputs an ON signal when operated to the ON position. The brake switch 7 is turned on when a brake pedal (not shown) is stepped on, and outputs an on signal.

The controller 8 is composed of a control circuit 9 as a restricting means and a releasing means, a timer circuit 10, and a drive circuit 11. Here, the control circuit 9 sets the timer circuit 10 at a predetermined timing based on the ON signal from the ignition switch 6, the neutral detection switch 4 and the brake switch 7 and turns the drive circuit 11 on and off. When the timer circuit 10 is set by the control circuit 9 when the ignition switch 6 is in the ON state, the timer circuit 10 starts the time counting operation from that timing, and outputs a time-up signal to the control circuit 9 when the time counting time reaches 10 minutes. Output. In this case, when the timer circuit 10 is set by the control circuit 9 before the time measuring time reaches 10 minutes, the timer circuit 10 resets the time measuring time at that timing and restarts the time measuring operation. The drive circuit 11 keeps the solenoid 3 turned on when the ignition switch 6 is turned on by the control circuit 9 and keeps the solenoid 3 turned off when the ignition switch 6 is turned off. ing.

Next, the operation of the above configuration will be described based on the flowchart of FIG. 2 showing the operation of the control circuit 9 in the controller 8 and FIG. 3 showing a timing chart. When the ignition switch 6 is turned on to start the engine, the ignition switch 6 outputs an ON signal to the controller 8. Then, the control circuit 9 proceeds from step S1 to step S2 to judge the ON state of the brake switch 7. At this time, when the ignition switch 6 is turned on while the brake pedal is stepped on, the brake circuit 7 is on, so the control circuit 9 proceeds from step S2 to step S3 to drive the drive circuit 11. The solenoid 3 is switched to the on state, that is, the release state in which the movement restriction of the shift lever 2 is released (timing shown by A in FIG. 3). This allows the shift lever 2 to be shifted from the neutral position to another position. At this time, when the brake pedal is stepped on while the shift lever 2 is in the neutral position, the control circuit 9 keeps the solenoid 3 on by repeating steps S2, S3 and S4. To do.

When the brake pedal is discontinued without shifting the shift lever 2 from the neutral position to another position, the control circuit 9 proceeds from step S2 to step S11 to turn off the solenoid 3. Switch to the state (timing shown by B in FIG. 3). As a result, the shift operation of the shift lever 2 from the neutral position is restricted.

When the brake pedal is depressed with the shift operation of the shift lever 2 being restricted as described above, the control circuit 9 proceeds from step S2 to step S3 to turn on the solenoid 3. (Timing indicated by C in FIG. 3), the shift operation of the shift lever 2 from the neutral position is permitted.

Therefore, when the shift lever 2 is shifted from the neutral position to another position while the brake pedal is stepped on, the neutral detection switch 4 is turned off (timing indicated by D in FIG. 3), so that the control circuit 9 Stands by until the neutral detection switch 4 is turned on by proceeding from step S4 to step S5.

Now, when the vehicle is stopped and the shift lever 2 is positioned at the neutral position, the neutral detection switch 4 is turned on (timing indicated by E in FIG. 3), so the control circuit 9 causes the steps S5 to S6. To determine whether the brake switch 7 is on. At this time, when the brake pedal is not depressed, the brake switch 7 is off, so the control circuit 9 advances from step S6 to step S7 and sets the timer circuit 10. As a result, the timer circuit 10 executes the timing operation.

Then, the control circuit 9 detects the ON state of the brake switch 7 or the OFF state of the neutral detection switch 4 during the time counting operation of the timer circuit 10 (steps S8, S9). If the non-detection state continues until the time-up signal is output, the process proceeds from step S10 to step S11 to turn off the solenoid 3 (timing indicated by F in FIG. 3). As a result, the shift lever 2 is in a restricted state in which the shift operation from the neutral position is restricted.

Subsequently, the control circuit 9 returns from step S11 to step S2 to determine the ON state of the brake switch 7. At this time, when the brake pedal is not stepped on, the brake switch 7 is off, so the control circuit 9 proceeds from step S2 to step S11 to continue the off state of the solenoid 3.

Now, when the brake pedal is stepped on while the movement of the shift lever 2 from the neutral position is restricted by the OFF state of the solenoid 3 as described above, the brake switch 7 is turned on (see G in FIG. 3). (The timing shown by), the control circuit 9 proceeds from step S2 to step S3 to drive the drive circuit 11 to turn on the solenoid 3. As a result, the shift operation of the shift lever 2 is permitted. Therefore, when the shift lever 2 is shifted from the neutral position to another position, the neutral detection switch 4 is turned off (timing indicated by H in FIG. 3). At this time, if the brake pedal 7 is released after the shift lever 2 is shifted to the neutral position while the brake pedal is being continuously pressed, the brake switch 7 is turned off. To step S7, the timer circuit 10 is set (timing indicated by I in FIG. 3). If the brake pedal is not depressed for 10 minutes while the shift lever 2 is in the neutral position, the control circuit 9 proceeds from step S8, S9, S10 to step S11 to turn off the solenoid 3. (Timing indicated by J in FIG. 3). As a result, movement of the shift lever 2 from the neutral position is restricted.

When the brake switch is depressed with the movement of the shift lever 2 restricted, the control circuit 9 proceeds from step S2 to step S3 to turn on the solenoid 3 (K in FIG. 3). (Timing shown by), the shift operation of the shift lever 2 is released.

When the shift lever 2 is shifted from the neutral position to another position while the brake pedal is stepped on, and then the shift lever 2 is shifted to the neutral position while the brake pedal is released, the control is performed. The circuit 9 proceeds from step S4, S5, S6 to step S7 to set the timer circuit 10 (timing shown by L in FIG. 3). As a result, the timing operation of the timer circuit 10 starts.

When the brake pedal is stepped on and released during the time counting operation of the timer circuit 10 as described above, the control circuit 9 returns from step S 8 to step S 7 and sets the timer circuit 9 again. (Timing shown by M in FIG. 3).

On the other hand, when the shift lever 2 is shifted from the neutral position to another position during the time counting operation of the timer circuit 10 and then shift-operated again to the neutral position, the control circuit 9 causes the steps S9 to S7. And the timer circuit 10 is set again (timing shown by N in FIG. 3).

When the brake is stepped on with the ignition switch 6 in the off state (timing indicated by O in FIG. 3), the control circuit 9 does not turn on the solenoid 3, so that the shift lever 2 moves from the neutral position. Is regulated.

In the case of this embodiment, the steps S2, S3 and S4 described above correspond to the releasing means, and the steps S5, S6, S7, S8, S9, S10 and S11 correspond to the regulating means.

In short, in the case of the above-mentioned configuration, the controller 8 turns off the solenoid 3 only when the brake pedal is stepped on immediately after the engine is started or when the solenoid 3 is off, and permits the shift operation of the shift lever 2. If the brake pedal is not depressed for 10 minutes when the shift lever 2 is operated from another position to the neutral position, the solenoid 3 is turned on to restrict the shift operation of the shift lever 2 from the neutral position. Therefore, the operability can be improved as compared with the configuration in which the lock mechanism must be released in order to shift the shift lever 2 from the neutral position.

Further, in the above embodiment, the shift operation of the shift lever 2 is restricted when the solenoid 3 is off, so that the solenoid 3 is turned off when the power source is not energized (the ignition switch 6 is off). The shift operation of the shift lever 2 is restricted. Therefore, if the engine is stopped while the shift lever 2 is in the neutral position, careless shift operation of the shift lever 2 to a position other than the neutral position is prohibited when the engine is stopped. The engine can be started immediately by operating the keys on the switch 6. In this case, since the solenoid 3 can be switched to the same state as the on state by operating the mechanical release button 5, the shift lever 2 is shifted from the neutral position while the power is off or the battery is discharged. can do.

[0027]

[Effect of the device]

 As is clear from the above description, according to the vehicular automatic transmission of the present invention, the shift lever is prevented from being shifted from the neutral position to another position, and the above-mentioned regulated state and its state are provided according to an external operation. The shift operation control means for switching to the released state where the restriction is released is provided, and the shift operation control is performed only when the brake pedal is operated immediately after the engine is started or when the shift operation control means is switched to the restricted state. Release means for switching the means to the release state is provided, and when the shift lever is positioned from another position to the neutral position in the release state by the release means, when the non-operation state of the brake pedal continues for a set time, Since the restriction means for switching the shift operation control means to the restricted state is provided, The reverse position, neutral position, and drive position are set as options, and the shift operation from the neutral position is restricted in the automatic transmission for vehicles that allows the engine to be started only when the shift lever is in the neutral position. It has an excellent effect that the operability can be improved while the shift lock function is added.

[Brief description of drawings]

FIG. 1 is a block diagram showing the overall configuration of an embodiment of the present invention.

FIG. 2 is a flowchart showing the operation of the control circuit.

FIG. 3 is a timing chart showing the operation.

[Explanation of symbols]

1 is a shift lever device, 2 is a shift lever, 3 is a solenoid (shift operation control means), 4 is a neutral detection switch, 6 is an ignition switch, 7 is a brake switch, 9 is a control circuit (regulating means, releasing means), 10 Is a timer circuit.

Claims (1)

[Scope of utility model registration request] 1. An automatic transmission for a vehicle, wherein a reverse position, a neutral position, and a drive position are set as shift positions, and the engine is allowed to start only when the shift lever is in the neutral position. The shift operation control means is provided for restricting the shift operation from the neutral position to another position and is switched to the restricted state and the released state in which the restriction is released according to an external operation, and the engine is started. Immediately after or in a state where the shift operation control means is switched to the restricted state, release means for switching the shift operation control means to the release state only when the brake pedal is operated, and the shift lever in the release state by the release means. Neutral from other positions A vehicle automatic transmission, comprising: restriction means for switching the shift operation control means to a restricted state when the non-operated state of the brake pedal continues for a set time when the brake pedal is in the full position.